target/ppc: Simplify ppcemb_tlb_search()

No nead to store return value and break from loop when we can return
directly.

Signed-off-by: BALATON Zoltan <balaton@eik.bme.hu>
Reviewed-by: Cédric Le Goater <clg@kaod.org>
Message-Id: <d470118c3adcbd41b1a91779f6bb7cbdb2b0d346.1685448535.git.balaton@eik.bme.hu>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>

target/ppc/mmu_common.c

@@ -521,19 +521,15 @@ int ppcemb_tlb_search(CPUPPCState *env, target_ulong address, uint32_t pid)
 {
     ppcemb_tlb_t *tlb;
     hwaddr raddr;
-    int i, ret;
+    int i;
 
-    /* Default return value is no match */
-    ret = -1;
     for (i = 0; i < env->nb_tlb; i++) {
         tlb = &env->tlb.tlbe[i];
         if (ppcemb_tlb_check(env, tlb, &raddr, address, pid, i) == 0) {
-            ret = i;
-            break;
+            return i;
         }
     }
-
-    return ret;
+    return -1;
 }
 
 static int mmu40x_get_physical_address(CPUPPCState *env, mmu_ctx_t *ctx,